MOSCOW, June 7. /TASS/. A series of attacks in Iran confirms that the outbreak of international terrorism is unprecedented, Russian Foreign Minister Sergey Lavrov said after talks with his Spanish counterpart Alfonso Dastis Quecedo on Wednesday.

"We expect to hold a meeting of the bilateral (Russia-Spain) working group on curbing new challenges and threats soon," Lavrov said.

"Amid the unprecedented surge in international terrorism, the activity of this group is in high demand. Terrorists won’t calm down, and this is confirmed every day, including by today’s terror attacks in Iran," he said noting that the Islamic State (terror group, outlawed in Russia) has claimed responsibility for these attacks.

According to earlier reports, at around 10:30 a.m. local time four gunmen burst into the Iranian parliament’s building and opened fire at the security guards. Seven people were killed in a shootout in the Iranian parliament and four are held hostage, the Tasnim news agency said on its Twitter page.

A similar attack was staged by unidentified terrorists on Wednesday at the Khomeini Mausoleum 40 kilometers south of Tehran. At least one militant armed with a Kalashnikov assault rifle got into the mausoleum and opened fire. After spending all cartridges he threw the weapon on the ground and blew himself up.